- Phytoplankton“Around 50 percent of the oxygen we breathe comes from phytoplankton,” said Brenda María Soler-Figueroa, a marine biologist at the Smithsonian Environmental Research Center. Phytoplankton are tiny plants that live on the surface of oceans and lakes.www.washingtonpost.com/lifestyle/kidspost/where-does-the-oxygen-we-breath…
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10 Interesting Things About Air - NASA Climate Kids
Sep 25, 2024 · Air is mostly gas. Air is all around us, but we can’t see it. So what is air, exactly? It’s a mixture of different gases. The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, …
See results only from climatekids.nasa.gov10 Interesting Things Abou…
The amount of salt in salt water varies. In a gallon of average ocean water, there is …
What Causes Air Pollution
Air pollution is caused by solid or liquid particles and certain gases suspended …
What's in the Air? - Center for Science Education
See more on scied.ucar.eduThe most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas argon (Ar) is the third most abundant gas at 0.93%. There are also trace amounts of carbon dioxide (CO2), neon (Ne), helium (He), methane (CH4), krypt…Where does the nitrogen in the air come from?
Nitrogen makes up 78 per cent of the air we breathe, and it’s thought that most of it was initially trapped in the chunks of primordial rubble that formed the Earth. When they smashed …
What are the sources of carbon dioxide in the …
Oct 1, 2024 · Human activity causes carbon dioxide (COâ‚‚) and other greenhouse gases to be emitted into the atmosphere. Scientists know that the source of COâ‚‚ in the atmosphere is the result of human activity (e.g. burning fossil fuels to …
Air - National Geographic Society
Oct 1, 2024 · Air is the invisible mixture of gases that surrounds Earth. Air contains important substances, such as oxygen and nitrogen, that most species need to survive. A paratrooper with the Indian Army descends through the air …
Air | Composition, Oxygen, Nitrogen | Britannica
Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time.
The History of Air | Smithsonian
Apr 18, 2010 · The composition of gases in the atmosphere can change (and is changing now as we burn fossil fuels), and the fossil record reveals how something as deceptively simple as air …
The Chemical Composition of Air - ThoughtCo
Jul 29, 2024 · Nearly all of Earth's atmosphere (air) is comprised of a mere five gases: nitrogen, oxygen, water vapor, argon, and carbon dioxide. Several other compounds are also present in our air in trace amounts. Below is a …
Components of Air - Oxygen, Nitrogen, Carbon …
The mixture of gases that makes up the Earth’s atmosphere is known as air. Nitrogen makes up 78 % of this gas, which is mixed with oxygen (21%), water vapour (variable), argon (0.9 %), carbon dioxide (0.04%), and trace gases. …
What Causes Air Pollution? - NASA Climate Kids
Sep 25, 2024 · Air pollution is caused by solid or liquid particles and certain gases suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.